Triggers on cue, active effects lists it on for the duration 1.15 damage and +7 accuracy..
The +7 accuracy show in char screen and combat log tohit rolls ..
The 15% damage doesn't actually apply to weapon damage range ..
Numeric example ..
13 -19 sabre (fine 15%, 21 might 33%, reckless 20%)
char screen shows 22-32 ( 13 * (1+0.15+0.33+0.2)= 21.84 19 * (1+0.15+0.33+0.2) = 31.92 )
With fighting spirit active, as shown in char screen under active effects damage range should go up
to 13 * (1+ 0.15+0.33+ 0.2+0.15) = 23.79 19 * (1+ 0.15+0.33+ 0.2+0.15) = 34.77
But char screen still displays damage range as 22-32 ..
Probably related to blooded bug - buff/effect triggers properly and gives proper feedback (X activates Fighting spirit // Blooded in combat log, show up in char screen under active effects ) BUT GIVES NO DAMAGE BONUS WHATSOEVER ...